440 rear main seal... thoughts

I have my stroker crank installed and the rear main seal. I always am nervous when I do the rear seal. Don't want to take the engine back out to fix a leak so I decided to do this used part of an old oil pan and filled the seal end with oil over the rear seal retainer and rotated the crank a few times. I'm going to let it sit overnight thinking if it doesn't leak this way it may not leak when it's in the car. Thoughts?

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